Water-grate for furnaces



UNITE STATES RICHARD P. SHAOKELFORD, OF JERSEYVILLE, ILLINOIS.

WATER-G RATE FO R FU RNAC ES.

SPECIFICATION forming part of Letters Patent No. 305,480, dated September 23, 1884.

Application filed January 25, 1884. (No model.) I

to the letters of reference marked thereon.

My invention relates to an improvement in water-grates for furnaces, and is of that class provided with hollow grate bars, through which a current of water is made to flow for the double purpose of heating the water and preventing the grate-bars from becoming injuriously hot.

The object of my invention is to provide means whereby the inflowing water is made to circulate more advantageously than heretofore through all the grate-bars. This I accomplish by'certain details of construction, fully explained hereinafter.

In the drawings, Figure 1 is a plan view of the grate, showing the inlet and outlet pipes. Fig. 3 is a front end elevation of the same, showing part of the door of the front waterchamber broken away in order to exhibit the interior part thereof. Fig. 2 is a side elevation of the grate, showing a portion of the inlet and outlet pipes.

In Fig. 1, a a, &c.,'represent a series of tubular fire-bars communicating at their rear ends with a Water-chamber, A, a portion of which is exhibited as broken away to show theinterior, which is divided into three separate compartments, b, c, and d, a being an inletcompartment, and b and (Z outlet 'compartments. The front ends of said tubular firebars communicate with an undivided water- .chamber, B, situated directly below the furnace-door, and is preferably provided with a blow-off pipe, (3-. The central compartment, 0, of the chamber A is provided with an inletpipe, 6, the two outer compartments 1) and d i being furnished with outletpipes g g, united by a T-pipe, f, the latter designed to convey the hot water where required. It will be noticed that chamber B is provided with a removable door, 8, and also that chamber A coated, also for the purpose of cleaning the chambers themselves, access to the middle compartment, 0, of the chamber A being pro- Vided' for by the removal from the under side of the large flange 0 of the inlet-pipe e. The tubular fire-bars are preferably secured in the side of the chamber A by being screwed into threaded holes provided for their reception, the opposite ends being secured in corre sponding unthreaded holes in the inner side of the water-chamber B by means of inside and outside nuts, as shown in Fig. I.

The action of my device is thus: The cold water, being admitted by the inlet-pipe e to the central compartment, 0, of the water-chamber A, flows, as indicated by the arrows, through that part of the grate which is subject to the greatest intensity of heat.namely, the central part-int0 the chamber B, and then returns through the bars on either side to the com partments b and'rl, whence it is driven through the T-pipef to wherever required.

I am well aware that water-grates are not new, and therefore do not broadly claim such; but I.

What I do claim as my invention, and desire to secure by Letters Patent, is-

Ina water-grate for furnaces, the tubular bars a a, in combination with water chamcompartments 6, c, and d, the two former, b and 0, provided with outlet-pipes g g, and the latter, (Z, provided with an inlet-pipe,- e, sub- 5 bers A and B, the chamber B divided into 

